Stand by for a hub, since this is the second time I've seen this particular question . Jeorgebanny is absolutely right, they make excellent community fish. They are kept isolated in pet stores because the males are extremely competitive with each other and will try to hurt or kill one another, but they do very well with small, non-nippy fish of other species such as neon tetras, cardinal tetras, platies, etc. Any semi-aggressive community fish such as swordtails and barbs are a bad idea because they will shred the betta's fins. It's also quite popular to have a "sorority tank" or all-female betta tank.

They have a reputation for being aggressive, but I've seen at least one instance where two males were placed in the same tank and did not act aggressively. It depends on different factors, I think, like whether or not a female is present, the time of year, abundance of food, etc.

When I had a fish tank, I found one male beta to do fine with other fish, as long as there were at least six of each other kind of fish. (Six fish makes the minimum # required for a school.)

With multiple schools in my tank the beta's were left in peace and left other fish alone. When there were too few fish, either the beta would get picked on or pick on others. It just depended on the breed.

Betta fish tanki have a female Siamese fighting fish in a small thank i was thinking of putting her in a 5.7...lire sapphire aquarium tank but i don't know if i should put her in it. becuase i am new at it

i see some minute dots on my male Betta fish from yesterday, isthis an infection?i saw these dots yesterday and the number of these dots has increased. now they are on its fins and head. but they are not big they...